72916919 has 4 divisors (see below), whose sum is σ = 73126200. Its totient is φ = 72707640.

The previous prime is 72916871. The next prime is 72916951. The reversal of 72916919 is 91961927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91961927 = 443 ⋅207589.

It is a cyclic number.

It is not a de Polignac number, because 72916919 - 2²⁰ = 71868343 is a prime.

It is a super-3 number, since 3×72916919³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72916919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72912919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104117 + ... + 104814.

It is an arithmetic number, because the mean of its divisors is an integer number (18281550).

Almost surely, 2^72916919 is an apocalyptic number.

72916919 is a deficient number, since it is larger than the sum of its proper divisors (209281).

72916919 is a wasteful number, since it uses less digits than its factorization.

72916919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209280.

The product of its digits is 61236, while the sum is 44.

The square root of 72916919 is about 8539.1404134140. The cubic root of 72916919 is about 417.7753098264.

The spelling of 72916919 in words is "seventy-two million, nine hundred sixteen thousand, nine hundred nineteen".